IS20-925A Service Bulletin/Repair Instructions

IS-20925A
Instruction Sheet
CENTRAL HVAC MERV FILTERS INSTALLATION
Revision A
Info added: Optional metal frames available for kit 1 & 2
06-15-2021
APPLICATION

Part No.
Type
Vehicles
IS20925-1
MERV 8
H345 from A-1470 and up, X345 from B-5002 up to D-5458
IS20925-2
MERV 13
NOTE: 370479 & 370480 metal frames available for first installation
IS20925-3
MERV 8
IS20925-4
MERV 13
IS20925-5
MERV 8
IS20925-6
MERV 13
X345 from 7-8784 up to B-5001

H345 from R-012 to 9-1469
NOTE

Filter change is recommended every 3 months for MERV13 filters and every 6 months for

MERV8 filters
OPTIONAL MATERIAL

Order the following reusable metal frames for the first installation of Kit # IS20925-1 & # IS20925-2:

Part No.
Description
Qty
370479
OPTIONAL AIR FILTER FRAME 1" X 38" X 10-1/2" ASS (1)
1
370480
OPTIONAL AIR FILTER FRAME 1" X 38" X 10-1/2" ASS (2)
1
MATERIAL

Kit # IS20925-1 includes the following parts*:

Part No.

871466
Description
Qty
CENTRAL UNIT MERV8 FILTER 1" X 38" X 10 1/2
2
IS-20925
INSTRUCTION SHEET (EN)
1
FI-20925
INSTRUCTION SHEET (FR)
1
* 370479 & 370480 Optional metal frames available for first installation
Writer: mg
IS-20925

Page 2 / 7
Kit # IS20925-2 includes the following parts*:

Part No.

870142
Description
Qty
CENTRAL UNIT MERV13 FILTER 1" X 38" X 10 1/2
2
IS-20925
INSTRUCTION SHEET (EN)
1
FI-20925
INSTRUCTION SHEET (FR)
1
* 370479 & 370480 Optional metal frames available for first installation
Kit # IS20925-3 includes the following parts:

Part No.

870144
Description
Qty
CENTRAL UNIT MERV8 FILTER 1" X 38" X 21"
1
IS-20925
INSTRUCTION SHEET (EN)
1
FI-20925
INSTRUCTION SHEET (FR)
1
Kit # IS20925-4 includes the following parts:

Part No.

870145
Description
Qty
CENTRAL UNIT MERV13 FILTER 1" X 38" X 21"
1
IS-20925
INSTRUCTION SHEET (EN)
1
FI-20925
INSTRUCTION SHEET (FR)
1
Kit # IS20925-5 includes the following parts:

Part No.

870146
Description
Qty
CENTRAL UNIT MERV8 FILTER 1" X 23 3/8" X 43 1/2"
1
IS-20925
INSTRUCTION SHEET (EN)
1
FI-20925
INSTRUCTION SHEET (FR)
1
Kit # IS20925-6 includes the following parts:

Part No.

870147
Description
Qty
CENTRAL UNIT MERV13 FILTER 1" X 23 3/8" X 43 1/2"
1
IS-20925
INSTRUCTION SHEET (EN)
1
FI-20925
INSTRUCTION SHEET (FR)
1
NOTE

Material can be obtained through regular channels.
Writer: mg
IS-20925

Page 3 / 7
PROCEDURE
DANGER

Park vehicle safely, apply parking brake, stop engine. Prior to working on the vehicle, set the ignition

switch to the OFF position and trip the main circuit breakers equipped with a trip button. On Commuter

type vehicles, set the battery master switch (master cut-out) to the OFF position.

Lock out & Tag out (LOTO) must be performed during set-up, maintenance or repair activities. Refer to

your local procedure for detailed information regarding the control of hazardous energy.
CAUTION

All waste coming from the filters must be considered as potentially contaminated (dust and

particles). Handle accordingly & wear proper personal protection equipment (PPE).
1. Open the vehicle filter compartment door,

this door is located in the baggage

compartment next to the evaporator.

NOTE: Door size and shape may differ.
2. Remove the filter(s) from the evaporator

compartment.

NOTE: Vehicles may use one large or two small

filters (as shown on this late model H345). Refer to

tables above for correct application & part number
.
Writer: mg
IS-20925

Page 4 / 7
OPTIONAL AIR FILTER METAL FRAME INSTALLATION (FOR KITS IS20925-1 & IS20925-2)
1. Insert the filter in the frame making sure

that the element fits inside the locating

tabs.
2. Make sure that the airflow direction arrow

of the filter element matches with the

metal frame flow arrow.
3. Install both filters in the vehicle. Take note

that the upper filter is having a wider

handle with a protruding “hook” at the

lower corner (see image above).

4. Close the locking tab to secure the filters

in place.
Writer: mg
IS-20925

Page 5 / 7
STANDARD AIR FILTER INSTALLATION (ALL KITS)
1. Remove (drill out) all small rivets present

around the filter metal frame (metal frame

will be reused).
2. Unbent the metal frame locking tab

located at one of the frame corners and

open the metal frame to free the filter

element.
3. Remove the filter from the frame.
Writer: mg
IS-20925

Page 6 / 7
4. Push flat all metal tabs inside the frame

rail.
5. Insert the MERV filter in the frame rail.

Take note of the airflow direction of the

filter.

NOTE: Arrow and/or mesh side of the filter must

be pointing/facing the outside of the vehicle.
6. Reassemble the metal frame (insert and

bent back the locking tab).

7. Reinstall the filter(s) making sure that the

screen mesh is facing the outside of the

vehicle.
Writer: mg
IS-20925

Page 7 / 7
PARTS / WASTE DISPOSAL

Discard according to applicable environmental regulations (Municipal/State[Prov.]/ Federal)

Place old filters in plastic bags & follow current health agencies recommendation

regarding potentially contaminated waste disposal.
Writer: mg

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